I have created this information page for parents to complete that first week of school. I find it very handy. I keep all the cards in a binder and it makes it very easy to make those quick recess calls to parents and families. All the important information you need is at your fingertips!
I've also added a "Record of Communication" chart so that I can easily track calls, meetings, etc. It doesn't replace taking anecdotal notes, but it helps to have a quick "at a glance" look at things.